Thank you for this information. Shall I use a jquery.ajax-call or can I use the LOAD-helper?
2014-08-07 11:24 GMT+02:00 Niphlod <[email protected]>: > if you trigger an ajax request, if it's a GET (an idempotent method) you > may avoid reloading the page and get back a 304....................but it's > not handled automatically by web2py unless the content is static. > > > On Thursday, August 7, 2014 7:52:30 AM UTC+2, mweissen wrote: >> >> Dave told me that my explanation was not clear. Let me try it in other >> words. What I want is a program which periodically reloads a page (I think >> using LOAD is the best way), but only if I allow it. >> >> My idea was that the header parts "Last-Modified" and/or "ETag" could do >> the job. Therefore I wrote the program in two steps: >> >> (1) A controller without any response header modification. It shows the >> actual time and reloads once a second - everything is fine. >> >> The functions: >> >> def mytime(): >> jetzt=str(request.now)[:19] >> return dict(jetzt=jetzt) >> >> def init(): >> return dict() >> >> ------------------------- >> >> The views: >> >> mytime.load: >> {{=jetzt}} >> >> init.html: >> {{extend 'layout.html'}} >> {{=LOAD(f="mytime.load", ajax=True, timeout=1000, times="infinity")}} >> >> >> >> (2) Now I want to simulate an unchanged page. Anthony wrote on >> http://stackoverflow.com/questions/14515313/how-to- >> modify-web2py-download-function-to-return-304-not-modified-in-case-the >> how to change the header. I add the response.headers-lines with a *constant >> *"Last-Modified" time and/or a *constant *"ETag" (I think every value is >> allowed here). My hope has been that these modifications *would prevent >> a reload* of the page. If this would be correct I would always see the >> same time. But it did not work, regardless of the header modifications the >> page reloads again once a second. >> >> def mytime(): >> jetzt=str(request.now)[:19] >> mtime = "Mi, 06 Aug 2014 08:11:00 GMT" # always the same time! >> >> *response.headers['Last-Modified'] = mtime* >> >> * response.headers['Pragma'] = 'cache' response.headers['Cache-* >> *Control'] = 'private' response.headers['ETag'] = "123" # any value, >> constant* >> return dict(jetzt=jetzt) >> >> >> My primary problem is: the LOAD helper (or an other command?) asks the >> server periodically if there is a new content - and the server should >> reload the page under program control. >> >> Is it possible to solve it using the response headers? >> >> The purpose of the request.now call is only to show whether the page >> reloads or not. >> >> Regards, Martin >> >> - >> > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
